Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said, "A slave becomes nearest to his Rubb when he is in prostration. So increase supplications while prostrating.”

[Muslim Book 004, Chapter 37, Hadith # 979]

Lesson : as mentioned above in Surah Al-Qasas Ayat 24. “My Lord! Truly, I am in need of whatever good that You bestow on me” Both the Ahadith mentioned above, evidently show that there is greater possibility of acceptance of an invocation which is made in prostration. Therefore, one must do it in the voluntary Salat.